| Title | Year | Genre |
|---|---|---|
| Occultic;Nine | 2017 | Adventure |
| Occupation, The | 2019 | Adventure |
| Odin Sphere Leifthrasir | 2016 | RPG |
| Okami HD | 2017 | Adventure |
| OlliOlli - Epic Combo Edition | 2016 | Arcade |
| OlliOlli2 - Welcome to Olliwood | 2015 | Arcade |
| Omega Labyrinth Z | 2017 | RPG |
| Omega Quintet | 2015 | RPG |
| One Piece - Burning Blood | 2016 | Action |
| One Piece - Pirate Warriors 3 | 2015 | Action |
| One Piece - Unlimited World Red - Deluxe Edition | 2017 | Action |
| One Piece - World Seeker | 2019 | Action |
| One Piece Odyssey | 2023 | Action |
| Onechanbara Z2 - Chaos | 2015 | Action |
| Order, The - 1886 | 2015 | Action |
| Organ Trail - Complete Edition | 2015 | Adventure |
| Outcast - Second Contact | 2017 | Action |
| Outer Worlds, The | 2019 | FPS |
| Outlast | 2014 | Action |
| Outlast | 2014 | Action |
| Outlast 2 | 2017 | Action |
| Overcooked! | 2016 | Arcade |
| Owlboy | 2018 | Platform |
| Oxenfree | 2016 | Adventure |
